Thank you for the shout-out and the kind words, for the project as well as myself!
I feel a bit weird when it's described as a business model, because the curators will never receive more than a tip for their work, and everything else does to the delegators. But that's a definition issue I guess :)
No worries. I think because this is part of the economy and aims to add to it, it is a business by ecosystem proxy. :) when used well, those tips further add to the value and engagement on the platform. How I see it is that on Steem, everything is connected to the outcomes of the future.